Host-Guest Complexation-Induced Aggregation Based on Pyrene-Modified Cyclodextrins for Improved Electronic Circular Dichroism and Circularly Polarized Luminescence.
Angew Chem Int Ed Engl
; 61(29): e202203541, 2022 07 18.
Article
em En
| MEDLINE
| ID: mdl-35499863
ABSTRACT
Several γ-cyclodextrin (CD) derivatives mono- or di-substituted by pyrenes at the primary rim of the CD were demonstrated to aggregate into nano-strips in aqueous solutions, with the pyrene moieties interpenetrating into γ-CD cavities. The hydrophobic complexation-induced aggregation provides a rigid chiral environment for the pyrenes and leads to significant electronic circular dichroism (ECD) and circularly polarized luminescence (CPL) activities, giving unprecedently high gabs and glum values up to 4.3×10-2 and 5.3×10-2 , respectively. The aggregates lead to excimer emission with high quantum yields and show BCPL and BiCPL up to 338. 6â
M-1 cm-1 and 169.3â
M-1 cm-1 , respectively.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ciclodextrinas
/
Luminescência
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article